This video shows the Garrett At Pro freaking out if you will. It looks like it could be a bad coil. \rbr\rbrThe Garrett AT Pro was provided to me by Kellyco Metal Detectors. They are located just outside of Orlando Florida. Ive got it temporarily so I can do tons of testing with it. \rbr\rbr\rbrIf youre interested in the AT Pro, or just want some more information on it, check it out at Kellycos website: \rbr\rbr\rbrAlso check out Kellycos website for any metal detecting needs you have. They have just about everything! ?utms.